Using the clock to set alarms
In addition to displaying the date and time, the Clock app can be used as an alarm clock.
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To open the Clock app, in the Apps screen, tap Clock.
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Tap Alarm.
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Select any existing alarm to turn it on, or tap the alarm to change the alarm details.
To add a new alarm, tap + at the bottom of the screen.
To access more clock or alarm features, for example volume and snooze length, tap 
at the top of the screen and select Settings.
The Clock app also has a stopwatch and countdown timer.
